645348448 has 12 divisors (see below), whose sum is σ = 1270529820. Its totient is φ = 322674208.

The previous prime is 645348427. The next prime is 645348527. The reversal of 645348448 is 844843546.

It is a happy number.

645348448 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 645348398 and 645348407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10083538 + ... + 10083601.

It is an arithmetic number, because the mean of its divisors is an integer number (105877485).

Almost surely, 2^645348448 is an apocalyptic number.

It is an amenable number.

645348448 is a deficient number, since it is larger than the sum of its proper divisors (625181372).

645348448 is a wasteful number, since it uses less digits than its factorization.

645348448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20167149 (or 20167141 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 46.

The square root of 645348448 is about 25403.7093354494. The cubic root of 645348448 is about 864.1678200532.

The spelling of 645348448 in words is "six hundred forty-five million, three hundred forty-eight thousand, four hundred forty-eight".